1
a
: of, relating to, or concerned with atoms
atomic physics
b
: nuclear sense 2
atomic energy
2
a
: marked by acceptance of the theory of atomism
3
: minute
4
of a chemical element
: existing in the state of separate atoms
Synonyms of atomic
Examples of atomic in a Sentence
made atomic adjustments to the clock's mechanism to keep it from whirring as it ran
Recent Examples on the Web
To achieve this, the team took a single atomic-thick layer of silver iodide (AgI) sandwiched between two graphene sheets.
—
Christopher McFadden, Interesting Engineering, 6 Dec. 2025
Facing a criminal autocrat, the United States needed to prepare for war with the Soviets by all possible means, including tactical atomic weapons delivered by bomber and rocket.
—Big Think, 27 Nov. 2025
Raphaële Clément, Associate Professor of Materials Department at UC Santa Barbara, explains why this is a challenging task that necessitates an atomic-level understanding of the inner workings of battery materials.
—David L. Coddon, San Diego Union-Tribune, 27 Nov. 2025
China rejected this, but its growing atomic arsenal and attitude toward it could be a brake on Russia’s flirtation with nuclear war.
—Matthew Robinson, MSNBC Newsweek, 26 Nov. 2025
See All Example Sentences for atomic
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Christopher McFadden, Interesting Engineering, 6 Dec. 2025
Facing a criminal autocrat, the United States needed to prepare for war with the Soviets by all possible means, including tactical atomic weapons delivered by bomber and rocket.
—Big Think, 27 Nov. 2025
Raphaële Clément, Associate Professor of Materials Department at UC Santa Barbara, explains why this is a challenging task that necessitates an atomic-level understanding of the inner workings of battery materials.
—David L. Coddon, San Diego Union-Tribune, 27 Nov. 2025
China rejected this, but its growing atomic arsenal and attitude toward it could be a brake on Russia’s flirtation with nuclear war.
—Matthew Robinson, MSNBC Newsweek, 26 Nov. 2025
See All Example Sentences for atomic
Cite this Entry
“Atomic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/atomic. Accessed 8 Dec. 2025.
Copy CitationKids Definition
atomic
adjective
atom·ic
ə-ˈtäm-ik 
1
: of, relating to, or concerned with atoms, atomic bombs, or nuclear energy
atomic physics
the atomic age
atomic energy
2
: extremely small
3
: found in the state of separate atoms
atomic hydrogen
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